????
                     Holtz, Herbert M (b:)(d:)
                    |          ????
           Holtz, Lawrence John Otto (b:1936)(d:1962)
          |         |          ????
          |          Strassburger, Anita E (b:)(d:)
          |                    ????
 Holtz, John Elmer (b:1962)(alive: 2025)
          |                    ????
          |          Mayer, Elmer J (b:)(d:)
          |         |          ????
           Mayer, Margaret Janet (b:1940)(alive: 2025)
                    |          ????
                     Kroll, Margaret C (b:)(d:)
                               ????